Means for controlling engines



Feb. 10, 1931. J DIESCHER 1,792,147

MEANS FOR CONTROLLING ENGINES Filed Jan. 21, 1929 2 Sheets-Sheet 1ATTORNE-Y Feb. 10, 1931. IE HER 1,792,147

MEANS FOR CONTROLLING ENGINES Filed Jan. 21, 1929 -2 Sheets-Sheet 2 kWWW i If I Q9 6 Z 2/ 40 25 Z /0 /0 I I 0% j 7 /4 11 a j INVENTORATTORNEY I iMy ziri -venticnv: rel atesftoj compressors andil- Paren t b193115 1 l jnLrnnn -i ninsc nnn, cr ivmrintn, 3

-' MnAits -ronr cou'rnonn iw'e meme i 7 lApplicatioii fi led la nuary21'; 19 9, Serial no 333,382; j

[more particularlyato-ig'as compressors opermzing iunder:variablefintake and discharge "pressure; such astho 'se employed:intransporting gas? fromjthe prcducing-* fields to '7 :pointsof;consumption; the; principal object I l @015 the invention bingtoco'ntrolwthe Operationiof the compresserfiwithin a predeter A ii/Qfniined range iofpower'demand whereby drive ring? mechanism. havingrelatively low power I rating maybe employed; andfthe expenfseofinstalling; and ioperating: ccmpresser stations may-be-reduced.;- :7 I aIt is" We11' kndvvn':that2the' intake and dis pressures and occurs {at apoint which jean he f ;predetermined betw'een two extreines fiOne ofsaid extremes consists-in a condition cine-1* v pressure intanntakeandimaxlmunnpressure g V p 7 intake pressure curve,

inthe discharge"linefthe other extreme-being the zcondition wherein-'gthe' intake pressure :bequals'the 'disch arge pressure and no work 'isrequlred of the compressor. .:Themax1muma loadon the compressorcbccursapproximately at, I the i point wherein" the intake': pressure is aone-third of theld ischarg'e pressure.

7 Hr; so

I 4 ,heretofcre been provided having a maximum capacity-"0r power:rating-"capable cfi safe 0perati0n when the maximum ratio of the two I Vpressures-lemurs, although: substantially less power "maj be requ ii'edfor normal operation Gcmp'res'scrs? and engines 'therefcre'have i andthe dangerous ratioof pressures may-self Further objectsofiny,1nventi0n"are,'there-a f-Lfo're,-t0 control the operation (if acompres- 501' according to variations in the 'ratici of the intakepressuretothe i discharge pressure to) "suspend op'erati'cn cf thecompressor When the m'echainism whereby: compressor vgiants-hav- 1i'in,g':.-1int1ited' power capable -:of* caring for'the x15 d6n1 bereached,-sinc e itis necessary to avoid hazard 'cfhrea'kage' or damaget9 the compress01 plant in case'zcf suspension o'fsuppiy 'or i markedvariationindmand;

load thereonexceeds.a-predetermined value,

' V and to-provide automatically cperableccntrol normal;demandmay'safelybe installed in sys 'sures vary', 1 further and cf theinvention I have provided. improved detailsof,structure;.ithe'preferred' fgrmsgof V a:

which are illustrated/inc the accom panying} drawings, wherein: 1 r

constant "power under the Fig. 3 is a vertical secticn of the: device,

i 5 isa perspective view cftwc rnenihers" connected respectively withthe intake and discharge 1i'nes,= .and 'apartly disassembled contact-barmovable by the intake-controlled Tte nsvvher'ein particular obj ect ofthe-iii? 'vention is to adapt"controljrnechanismjfor becoming efiectiveaccordingitp ratios of like; influences to which they-are resp0nsive-+1,, In accomplishing-theseand"cther ehjects 5 Fig.1 is a perspectivevieivio'f a cfcm'pressor V andla'n engine for: operating:;thei;same,1andmy ccntrol devicecennecteditetheintake and -.'discharge'1ines ofthecompressor;

, Fig; 2 is a: chartillus tratingg the lrelaticn .v between. .the:intake-and: discharge; pressures J 1 and: particularly disclosing ratioat which the 'gmaxirnum loadis impcsedgon' the coinpresscr, jf andalsothe corresp nding reductionf-in max;

imuin discharge pressures attainable: With I varying: ratio to-'.

memberv intO conductive relationfiwith the discharge-connected memberfor controlling 1 ltheco'mpress'or.

' vReferring in detai-Ltdthe drawingsr .7 1 designates generallyanengine having a cylinder 2, and 3 acompiessorprcvided with v air-intake1i'ne4- and a discharge 1ine 5,:a11 0f which maybe of the ordinaryconstruction employedin compressor plants infsystems .for

transportingl'gas from' af" producing -field. V

Theengine may be cf anygde'sir'ed-type and is illustrated as'an internalcombustion en *gine provided With an electric circuit fifor igniting thecharges of fuel 'My device includes a by tubes Sand 9communicatingrespectively with" the intake and fdis'charge lines, I andtwo housing: 7 supported 7 ing Bourdontubes12 having stems 13'ex tendingthrough the bottom plate lei oi the housing and connected to the tubes 8andi).

The tubes are supported in and fixed'to shells 15 fixed to parallel-sidewalls 16 ofthe housing and disksl'? andlB rotatably'supportedconcentricallyof the shells by 'shaftsiltl keyed to gears 20 areoperableby segments 21 pivotally supported. bythe hous ng and movable by thelinks of the Bourdontubes, whereby the disks may be moved rotatably inresponse to variations 7 L take and discharge lines.

' -Mounted on the faceofthedisk l'fofthe intake-connected member 10is acam23 having-its-inner end 24 positioned adjacent the aXis'of the diskand its outer end 25 located ad acentthe periphery of the disk, the diskn 18 onthedischarge-controlled inniher 11includin an insulatin late'26anda conductoiiplate 27 connected to the disk and capable of r'beinggrounded through the shaft 19 into fthe housmgand'compressor, all forpurposes,

' vpresently described.

1 V The members10and llare positioned in alignment on oppositesid'ewalls of the hensing'withtheir disks registering and arranged inparallel, spaced relation." Ardividing wall I 28 located midway-10f thehousing between :the side wallsand parallel. thereto, is provided 1 witha vertically elongated" slot '29 for I ,slidable support ofa'contactbar'SO-haVing *atroller 31' rotatably'supported atone end glforengagement with the cam 23 and a contact 'p0i'n't32 atflits other endadapted to move in,

frictional contact with the face ofthe diski the-washer onthe'bar. V 7is rectangular for fitting slidahly 1n the slot dividing wall 28, thewasher 3 1 being removable to permitv insertion of the her through theslot and anut-35 being provided-to retain and has suitablelengthproportionate to the thickness of thelwalltospace the washers andprevent binding of the mounted barn The contact point 32 ispreferablyscrew-threadedly mounted on the outer end .ofthe bar.

27 on thememberll.

contact plate .t The bar. 3() is movable vertically in the slotteddividing wall by the cam engaging the roller 31 upon rotation of thedisk 17.

WVhen the roller andbar are moved'to maximum position, byfthe cam point25, the point 32 will bein contact with an. area of the disk n pressurein the in-" tatably movableresponsively to variations in Should :thepressure in tlie'ldisch increase, however; while: the'pressu-i"e -"i'nthe, intake is V stationary or slightly changed,- the contact plafltef27 *Wi-ll bepmoved'Ito ard; and j intogcontafct' with the cam;supported'contact if barr3og-thereuponclosingtlie control-circuit "andcausing? suspension of engine.

The body of the bar spring 40 anchored at 41 to the-dividing wall.

The disk 17 rotates responsively to variations in pressure in the intakeline, and itis apparenttherefore that if the disk 18 were stationary andthe contact plate 27; were in .fizzedposition, the controllclevice'would be responsive merely to"variations in pressure in'the intake. I

' Since'it-is' desii'edlito make the control device eflective when, thetwo pressures are in a predeterminedrelation, the disk 18 isropressurein' the discharge line; :Increa sing pressure in thedischargeline-the1 efore,:mayi cause the disk '18, toi'f inove'rotatively in an d 'anti'clockwise directi'on so 'th at when increasin'gpressure: in: the intake causes thef'intake' member tomove also in ananticlockwise direction, the contact bHJI WIl-TbG mOVBd OVGI'the*insulatingfiportion 26' of the disk,'- the conductive plate 27;will-,notbe toucheidr Thus I the relatively unchanged ratio of in;

take and dji'schargei pressuresunder hich wHO 'IHCIYGRS G V a p p fsor,w1ll-br1ng about no j modificat on in the load is put; upon thecompresoperation of the engine.

arge line r efienie th jvIt-iis apparentthereforethat operation iofthe'engine iscontrolled in: accordance with the ratio ofithe intakepressure-tolthe discharge pressure whether the pressures are smallor.large. i. I In Fig. 2' curve 42-showsthe'fiuctuating powerx demanded-Ton-constant discharge pressure, as l the; intake pressure varies on thescale 1 1 and curve 43 shows the fluctuation in maximum dischargepressure attainable on scale -45 with varying i intake pressures onscale with a maximum available power, in thiscase suflicient toxcompressgas Jfrom 295 poun dsf intake to 400 pounds discharge I pressure; Thecurves ,and-positionsiof'the A conductor 371s connected to a binding camand the contact plate 27fare' therefore upon .approach'ofthedangerousratio. 1

tersiPatent-iszr r i V, 1. Inza control devicefor" limiting the loadingof a'icom'pressor of the character described operable under variableintake and What I claim anddesire to secure byiLetf discharge pressures,a-pair of members-re I s1: onsive respectively'to intake and dischargepressures andincluding rotatable disks; one

having a contact plate adjacent" its periphery,

- an electric 'circuit iorcontrolling the com-1 .pressor and meansmovable by the first named member into and. out of contact, With sa dpressor. to a predetermined ratio between V the intake andthe dischargepressures, a p'lural ty of members responsive respectively to 1including an electric circuit and. members responsive to. fluctuationsof pressures in the lines, means operable by said members andeffectivewhen the ratio betweenthe pres:

sures: is at approximately the normal-power" capacity of the 'thecircuittj V i o 4-. Inapparatus of the character described I of thepressures.

the intake and the discharge pressures, one

member including a rotatable disk having a l cam on its face having a'maximu'infpoint, the

other member including a rotatable disk having a contact plate adjacentits periphery, an

electric circuit, and a contact 'inovableby theoam-into circuit closingengagement with V the disk -supported contact plate when the twomembersaremovedun'der the influences ofithe' intake and "dischargepressures into positions indicating the predetermined ratio f 3. Inapparatus ofthe'character described fincluding'a plurality'of lines forconduct-; v ling gas under variablepressures, means for compressing thegas :havinga normal power capacity, and 1 compressor control elementsincludingiarflow line for-fluid delivered to the l ne under pressureiorflow therethrough',

and a pump'dividi ngthe line into intake and f discharge portions, saidportions being re spectively s'ub ect to variable pressures of thefluidQthere im-the pump operating at a pre-:.

determined value of t heratio between the pressures for passing fluidfrom the intake portion'to the discharge portion, andmeans forcontrolling operation of the pump, a plurality of means responsiverespectively to said pressures including means eii'ecti ve'whjen theratio of the pressures varies from' said controlmeans. v V

5. In apparatus of the character described including a flow lineior. flud delivered to predetermined value controlling said pump" the'lineunderpressure, apump in theeline dividing the' same into intake anddischarge portions and operating when the pressure in the intake portionhas a predetermined ratio to the pressure inthe'dischargeportion,andmeans responsive'respectively to said pres-' suresincluding meanseffective when the pressure in the intake portion falls to a valuebeloyi said predetermined ratio for suspending'operation of the pump. e

' 6. In apparatus of the character described including a pump, intakeand discharge lines,

and pump operating means including an electr c circuit, means includinga second pressurei inthe, other-line controlling said 7 v tuating thecoi'npressor, intake and discharge p lines sulnect to variable pressuresof fiuid scribed including a fiow'line', a compressor interposed fin theline, members responsive when the pressure effects on said memberselectric'cir'c uit andamember responsive to pressure in'one of the linescontrolling said operating" means, andf means responsive to secondcircuit. .;i a r 7. a control device ofthe character described forlimiting the loading 1 of. a compressor operable under variable intaikeand discharge pressures, a ,pair' of members responsive respectively tointake and discharge pressures, an electric circuit for controlling thecompressor,;-a icontact plate} one-one of said members,--'and-mea'nsmovable by the 9 other member intd and out; of contact With saidplatefforc'ontijollingthecircuit. '1 I 8. In a contr'ol'device of thecharacterde-d scribediforlimiting" the loading' offa coma pressoroperable under variable' intake and discharge pressures,-fan electriccircuit for bers; responsive respectively to the ntake and n dischargepressures, one-0t sa d memcontrolling the compressor, a pair of mem bersbeing rotative and providedwith'a con tact plate,and meansmovable bytherotherfi; I member intoand outjof contact. with said plate forcontrolling'the' circuitfi y V 92 In? a-"controldevice oilthe'jcharacter described including members responsive to va-'contactplate movable by one of theme nbers, B

Qan'd' a contact-movable: bythe other member 1' q 'j compressor forcontroll ngfor controlling the circuit. 3

10C111; apparatus of the charact'e includingla ga's compressor, a motorfor actherein, and members responsive respectivelylto-pressuresjn the"intake anddisch'arge'. lines, a plurality of cooperating. means eachndependently controlledgby one of said-meme bers and efiective when theratioof thepres sures reaches a predetermined value ior con- 3 trollingthemotor;

311.111 apparatusof the character de-i respectively topressuresin theline on opposite sides of the compressor, and means for controll ng thecompressor, means effective.

arexin predetermined relation-tor, rendering I said control meanseffective.

ALFR D fJ. 7'DIESGHER."

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